LangChain serialization injection vulnerability enables secret extraction in dumps/loads APIs_CVE-2025-68664

{
    "lastseen": "",
    "description": "LangChain is a framework for building agents and LLM-powered applications. Prior to versions 0.3.81 and 1.2.5, a serialization injection vulnerability exists in LangChain's dumps() and dumpd() functions. The functions do not escape dictionaries with 'lc' keys when serializing free-form dictionaries. The 'lc' key is used internally by LangChain to mark serialized objects. When user-controlled data contains this key structure, it is treated as a legitimate LangChain object during deserialization rather than plain user data. This issue has been patched in versions 0.3.81 and 1.2.5.",
    "published": "2025-12-23T22:47:44.084Z",
    "modified": "2025-12-23T22:47:44.084Z",
    "type": "cve",
    "title": "LangChain serialization injection vulnerability enables secret extraction in dumps/loads APIs",
    "source": "GitHub_M",
    "references": "https://github.com/langchain-ai/langchain/security/advisories/GHSA-c67j-w6g6-q2cm\nhttps://github.com/langchain-ai/langchain/pull/34455\nhttps://github.com/langchain-ai/langchain/pull/34458\nhttps://github.com/langchain-ai/langchain/commit/5ec0fa69de31bbe3d76e4cf9cd65a6accb8466c8\nhttps://github.com/langchain-ai/langchain/commit/d9ec4c5cc78960abd37da79b0250f5642e6f0ce6\nhttps://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D0.3.81\nhttps://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D1.2.5",
    "id": "CVE-2025-68664",
    "bulletinFamily": "",
    "cwe": [
        "CWE-502"
    ],
    "cvelist": null,
    "sourceData": "langchain-ai langchain >= 1.0.0, < 1.2.5\nlangchain-ai langchain < 0.3.81",
    "sourceHref": "",
    "cvss": {
        "score": 9.3,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "langchain",
    "version": ">= 1.0.0, < 1.2.5",
    "vendor": "langchain-ai",
    "ai_description": "Serialization injection vulnerability in LangChain's dumps() and dumpd() functions",
    "ai_severity": "Critical",
    "ai_vendor": "langchain-ai",
    "ai_product": "LangChain",
    "ai_version": "< 0.3.81, >= 1.0.0, < 1.2.5",
    "ai_score": 9.3
}